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Date: Mon, 21 Jul 2003 02:53:35 -0700 (PDT)
From: "Kevin Stevens" <Kevin_Stevens@pursued-with.net>
To: "Andrea Venturoli" <ml.ventu@flashnet.it>
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cc: freebsd-net@freebsd.org
Subject: Re: xl0 full duplex
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> xl0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
>         options=3<rxcsum,txcsum>
>         inet 10.1.2.15 netmask 0xffffff00 broadcast 10.1.2.255
>         inet 10.1.2.126 netmask 0xffffffff broadcast 10.1.2.126
>         ether 00:00:5e:00:01:02
>         media: Ethernet 10baseT/UTP (10baseT/UTP <half-duplex>)
>
> I tried:
>
> ifconfig xl0 10.1.2.15 netmask 255.255.255.0 mediaopt full-duplex
>
> since it is connected to a full-duplex switch.
>
> However, network throughput will crawl, i.e, for example, listening to an
> mp3 from this machine will give 1 sec. of
> audio, then 1 sec. of silence, then 1 sec. of audio, and so on.

Do you know that full-duplex is supported and enabled on the switch for
10Mb operation?  Some only support half-duplex for 10Mb, others have to be
forced.

KeS